A residual smoothing strategy for accelerating Newton method continuation
نویسندگان
چکیده
A technique for accelerating global convergence of pseudo-transient continuation Newton methods is proposed based on residual smoothing. The motivated by the effectiveness local nonlinear smoothers at overcoming strong transients. In limit a small pseudo-time step, method reduces to smoothing technique, while in large steps, an exact recovered along with its quadratic properties. formulation relies addition source term leaving Jacobian matrix unchanged, thus simplifying implementations existing solvers. demonstrated steady-state and implicit time-dependent computational fluid dynamics problem, showing significant gains overall solution efficiency.
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ژورنال
عنوان ژورنال: Computers & Fluids
سال: 2021
ISSN: ['0045-7930', '1879-0747']
DOI: https://doi.org/10.1016/j.compfluid.2021.104859